#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<list>
using namespace std;
int main()
{
	list<int> node;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		node.push_back(i);
	}
	list<int>::iterator it = node.begin();

}